664045424 has 40 divisors (see below), whose sum is σ = 1484155008. Its totient is φ = 281926080.

The previous prime is 664045399. The next prime is 664045453. The reversal of 664045424 is 424540466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15722 + ... + 39689.

Almost surely, 2^664045424 is an apocalyptic number.

It is an amenable number.

664045424 is an abundant number, since it is smaller than the sum of its proper divisors (820109584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664045424 is a wasteful number, since it uses less digits than its factorization.

664045424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55533 (or 55527 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

The square root of 664045424 is about 25769.0788349138. The cubic root of 664045424 is about 872.4340276825.

The spelling of 664045424 in words is "six hundred sixty-four million, forty-five thousand, four hundred twenty-four".